Magnesite

Magnesite GOST 1216-87 Indicator name Norm for grade PMK-87 PMK-83 PMK-75 Appearance White to yellow powder Mass fraction (per absolutely dry substance), % magnesium oxide (MgO), not less than calcium oxide (CaO), no more than silicon oxide (SiO2), no more than the sum of iron and aluminum oxides (Fe2O3 + Al2O3), no more than sulfates (in terms of SO42-), no more than carbon (C), no more than 871.81.82.2–– 832.52.5––– 754.53 .5––– Change in mass during ignition, %, no more than 6 8 18 Change in mass during ignition after hydration, %, no less (for special purposes only) 20 - - Mass fraction of moisture, %, no more than 1.0 1.3 1.5 Grain composition , mass fraction, % passage through mesh No. 02 remainder on mesh No. 02, no more than passage through mesh No. 009, no less -575 -575 100-- Imported magnesite Appearance Gray, white powder Mass fraction, % magnesium oxide (MgO) calcium oxide (CaO) silicon oxide (SiO2) sum of iron and aluminum oxides (Fe2O3 + Al2O3) 88,320,124,120,08 Change in mass upon ignition, %, no more than 3.55 Grain composition, µm 120 Safety requirements Hazard class according to the degree of exposure to the human body 4 Types of hazard Explosion and fire hazard Non-flammable, fire and explosion-proof Personal protective equipment Overalls, personal respiratory protection equipment (ShB-1 'Lepestok' respirators), mittens. Personal hygiene measures must be observed, washing hands before eating, eating in special rooms. Guaranteed shelf life of the product is not limited. Caustic magnesite is produced mainly by the method of roasting and grinding carbonate sedimentary rocks (mainly magnesite). The substance has good astringent properties. When mixed with water, it dissolves weakly and for a long time, the finished concrete turns out to be of low strength, so catalysts (salts of magnesium chloride and magnesium sulfate) are additionally introduced into it. Caustic magnesite is highly hygroscopic and transfers this property to products made from it. To minimize the likelihood of dampness and the formation of efflorescence, and to increase the water resistance of structures, iron sulfate is added to the solution. Products made from magnesia cement have useful properties, including fire resistance, frost resistance, and impact resistance. They are odorless and are environmentally friendly materials, so they can be used for finishing public spaces. Magnesite slabs provide good thermal and sound insulation, have high ductility and low weight. Their advantages include hygiene, abrasion resistance, and electrical insulating properties. Caustic magnesite is a light-colored powder without a characteristic odor. The substance is explosion- and fireproof and does not harm the environment. Due to fine dust, it can irritate the respiratory system with prolonged exposure, so it is necessary to work with it in a respirator and other personal protective equipment. Caustic magnesite can be transported by any type of transport in containers that prevent waterlogging of the raw material. For storage and transportation, you can use bags made of multilayer paper, polymers, as well as barrels, boxes, and containers. The cargo should be stored in a dry place. We sell magnesite powder of several brands: PMK-87 - used in the chemical, energy industries, glass production, suitable for special needs due to its high degree of purification, PMK-83 - has a similar application except for special needs, PMK-75 - has optimal properties to be used as a binder. Caustic magnesite is used as a fast-hardening, high-strength binder in the construction of self-leveling floors. Thermal insulation materials are made from it - gas magnesite and foam magnesite, which also contain other mineral fillers. Since the substance preserves wood well, it is used to produce fiberboard (a mixture of binder and shavings).